| /****************************************************************************** |
| * |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ***************************************************************************** |
| * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <math.h> |
| #include <string.h> |
| |
| #include "impd_type_def.h" |
| #include "impd_drc_extr_delta_coded_info.h" |
| #include "impd_drc_common.h" |
| #include "impd_drc_struct.h" |
| #include "impd_drc_filter_bank.h" |
| #include "impd_drc_multi_band.h" |
| #include "impd_drc_gain_dec.h" |
| #include "impd_drc_process_audio.h" |
| |
| VOID impd_apply_gains_and_add( |
| ia_drc_instructions_struct* pstr_drc_instruction_arr, |
| const WORD32 drc_instructions_index, |
| ia_drc_params_struct* ia_drc_params_struct, |
| ia_gain_buffer_struct* pstr_gain_buf, |
| shape_filter_block shape_filter_block[], FLOAT32* deinterleaved_audio[], |
| |
| FLOAT32* channel_audio[], WORD32 impd_apply_gains) { |
| WORD32 c, b, g, i; |
| WORD32 offset = 0, signal_index = 0; |
| WORD32 gain_index_for_group[CHANNEL_GROUP_COUNT_MAX]; |
| WORD32 signal_index_for_channel[MAX_CHANNEL_COUNT]; |
| FLOAT32* lpcm_gains; |
| FLOAT32 sum; |
| FLOAT32 drc_gain_last = 0, gain_thr; |
| WORD32 i_end, i_start; |
| ia_drc_instructions_struct* str_drc_instruction_str = |
| &(pstr_drc_instruction_arr[drc_instructions_index]); |
| |
| if (drc_instructions_index >= 0) { |
| str_drc_instruction_str = |
| &(pstr_drc_instruction_arr[drc_instructions_index]); |
| { |
| if (str_drc_instruction_str->drc_set_id > 0) { |
| if (ia_drc_params_struct->delay_mode == DELAY_MODE_LOW_DELAY) { |
| offset = ia_drc_params_struct->drc_frame_size; |
| } |
| gain_index_for_group[0] = 0; |
| for (g = 0; g < str_drc_instruction_str->num_drc_ch_groups - 1; g++) { |
| gain_index_for_group[g + 1] = |
| gain_index_for_group[g] + |
| str_drc_instruction_str->band_count_of_ch_group[g]; |
| } |
| signal_index_for_channel[0] = 0; |
| for (c = 0; c < str_drc_instruction_str->audio_num_chan - 1; c++) { |
| if (str_drc_instruction_str->channel_group_of_ch[c] >= 0) { |
| signal_index_for_channel[c + 1] = |
| signal_index_for_channel[c] + |
| str_drc_instruction_str->band_count_of_ch_group |
| [str_drc_instruction_str->channel_group_of_ch[c]]; |
| } else { |
| signal_index_for_channel[c + 1] = signal_index_for_channel[c] + 1; |
| } |
| } |
| |
| for (g = 0; g < str_drc_instruction_str->num_drc_ch_groups; g++) { |
| for (b = 0; b < str_drc_instruction_str->band_count_of_ch_group[g]; |
| b++) { |
| if (str_drc_instruction_str->ch_group_parametric_drc_flag[g] == 0) { |
| lpcm_gains = |
| pstr_gain_buf->buf_interpolation[gain_index_for_group[g] + b] |
| .lpcm_gains + |
| MAX_SIGNAL_DELAY - ia_drc_params_struct->gain_delay_samples - |
| ia_drc_params_struct->audio_delay_samples + offset; |
| } else { |
| lpcm_gains = |
| pstr_gain_buf->buf_interpolation[gain_index_for_group[g] + b] |
| .lpcm_gains + |
| MAX_SIGNAL_DELAY + |
| str_drc_instruction_str |
| ->parametric_drc_look_ahead_samples[g] - |
| ia_drc_params_struct->audio_delay_samples; |
| } |
| i_end = 0; |
| i_start = 0; |
| while (i_end < ia_drc_params_struct->drc_frame_size) { |
| if (shape_filter_block[g].shape_flter_block_flag) { |
| drc_gain_last = shape_filter_block[g].drc_gain_last; |
| gain_thr = 0.0001f * drc_gain_last; |
| while ((i_end < ia_drc_params_struct->drc_frame_size) && |
| (fabs(lpcm_gains[i_end] - drc_gain_last) <= gain_thr)) |
| i_end++; |
| } else { |
| i_end = ia_drc_params_struct->drc_frame_size; |
| } |
| |
| for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++) |
| |
| { |
| if (g == str_drc_instruction_str->channel_group_of_ch[c]) { |
| signal_index = signal_index_for_channel[c] + b; |
| |
| if (impd_apply_gains == 1) { |
| impd_shape_filt_block_time_process( |
| &shape_filter_block[g], &lpcm_gains[0], signal_index, |
| &deinterleaved_audio[signal_index][0], i_start, i_end); |
| |
| } else { |
| for (i = i_start; i < i_end; i++) { |
| deinterleaved_audio[signal_index][i] = lpcm_gains[i]; |
| } |
| } |
| } |
| } |
| if ((i_end < ia_drc_params_struct->drc_frame_size) && |
| (shape_filter_block[g].shape_flter_block_flag)) { |
| impd_shape_filt_block_adapt(lpcm_gains[i_end], |
| &shape_filter_block[g]); |
| } |
| if ((i_end == i_start) && |
| (drc_gain_last == shape_filter_block[g].drc_gain_last)) |
| break; |
| i_start = i_end; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| signal_index = 0; |
| |
| if (str_drc_instruction_str->drc_set_id > 0) { |
| for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++) |
| |
| { |
| g = str_drc_instruction_str->channel_group_of_ch[c]; |
| if (g >= 0) { |
| for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) { |
| sum = 0.0f; |
| for (b = 0; b < str_drc_instruction_str->band_count_of_ch_group[g]; |
| b++) { |
| sum += deinterleaved_audio[signal_index + b][i]; |
| } |
| |
| channel_audio[c][i] = sum; |
| } |
| signal_index += str_drc_instruction_str->band_count_of_ch_group[g]; |
| } else { |
| for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) { |
| channel_audio[c][i] = deinterleaved_audio[signal_index][i]; |
| } |
| signal_index++; |
| } |
| } |
| } else { |
| for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++) |
| |
| { |
| for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) { |
| channel_audio[c][i] = deinterleaved_audio[c][i]; |
| } |
| } |
| } |
| |
| return; |
| } |
| |
| WORD32 |
| impd_filter_banks_process(ia_drc_instructions_struct* pstr_drc_instruction_arr, |
| const WORD32 drc_instructions_index, |
| ia_drc_params_struct* ia_drc_params_struct, |
| FLOAT32* audio_io_buf[], |
| ia_audio_band_buffer_struct* audio_band_buffer, |
| ia_filter_banks_struct* ia_filter_banks_struct, |
| const WORD32 passThru) { |
| WORD32 c, g, e, i, num_bands; |
| // WORD32 err = 0; |
| FLOAT32* audio_in; |
| FLOAT32** audio_out; |
| ia_drc_filter_bank_struct* str_drc_filter_bank; |
| ia_drc_instructions_struct* str_drc_instruction_str; |
| WORD32 drc_frame_size = ia_drc_params_struct->drc_frame_size; |
| |
| if (drc_instructions_index >= 0) { |
| str_drc_instruction_str = |
| &(pstr_drc_instruction_arr[drc_instructions_index]); |
| } else { |
| return -1; |
| } |
| |
| e = 0; |
| |
| for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++) |
| |
| { |
| str_drc_filter_bank = NULL; |
| |
| audio_in = audio_io_buf[c]; |
| |
| audio_out = &(audio_band_buffer->non_interleaved_audio[e]); |
| if ((passThru == 0) && (drc_instructions_index >= 0)) { |
| if (str_drc_instruction_str->drc_set_id < 0) { |
| num_bands = 1; |
| } else { |
| g = str_drc_instruction_str->channel_group_of_ch[c]; |
| if (g == -1) { |
| num_bands = 1; |
| // if (ia_filter_banks_struct->str_drc_filter_bank != NULL) |
| //{ |
| str_drc_filter_bank = |
| &(ia_filter_banks_struct->str_drc_filter_bank |
| [str_drc_instruction_str->num_drc_ch_groups]); |
| //} |
| } else { |
| num_bands = str_drc_instruction_str->band_count_of_ch_group[g]; |
| // if (ia_filter_banks_struct->str_drc_filter_bank != NULL) |
| //{ |
| str_drc_filter_bank = |
| &(ia_filter_banks_struct->str_drc_filter_bank[g]); |
| //} |
| } |
| // if (ia_filter_banks_struct->str_drc_filter_bank != NULL) |
| //{ |
| // if (&str_drc_filter_bank->str_all_pass_cascade != NULL) |
| //{ |
| impd_all_pass_cascade_process( |
| &str_drc_filter_bank->str_all_pass_cascade, c, drc_frame_size, |
| audio_in); |
| //} |
| //} |
| } |
| } else { |
| num_bands = 1; |
| } |
| switch (num_bands) { |
| case 1: |
| for (i = 0; i < drc_frame_size; i++) { |
| audio_out[0][i] = audio_in[i]; |
| } |
| e++; |
| break; |
| case 2: |
| impd_two_band_filter_process(&str_drc_filter_bank->str_two_band_bank, c, |
| drc_frame_size, audio_in, audio_out); |
| e += 2; |
| break; |
| case 3: |
| impd_three_band_filter_process( |
| &str_drc_filter_bank->str_three_band_bank, c, drc_frame_size, |
| audio_in, audio_out); |
| e += 3; |
| break; |
| case 4: |
| impd_four_band_filter_process(&str_drc_filter_bank->str_four_band_bank, |
| c, drc_frame_size, audio_in, audio_out); |
| e += 4; |
| break; |
| default: |
| return (PARAM_ERROR); |
| break; |
| } |
| } |
| |
| return (0); |
| } |
| |
| VOID impd_store_audio_io_buffer_time( |
| FLOAT32* audio_in_out_buf[], ia_audio_in_out_buf* audio_io_buf_internal) { |
| WORD32 i, j; |
| |
| if (audio_io_buf_internal->audio_delay_samples) { |
| for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) { |
| for (j = 0; j < audio_io_buf_internal->frame_size; j++) { |
| audio_io_buf_internal->audio_io_buffer_delayed |
| [i][audio_io_buf_internal->audio_delay_samples + j] = |
| audio_in_out_buf[i][j]; |
| } |
| } |
| } else { |
| audio_io_buf_internal->audio_io_buffer_delayed = audio_in_out_buf; |
| audio_io_buf_internal->audio_in_out_buf = audio_in_out_buf; |
| } |
| |
| return; |
| } |
| |
| VOID impd_retrieve_audio_io_buffer_time( |
| FLOAT32* audio_in_out_buf[], ia_audio_in_out_buf* audio_io_buf_internal) { |
| WORD32 i, j; |
| |
| if (audio_io_buf_internal->audio_delay_samples) { |
| for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) { |
| for (j = 0; j < audio_io_buf_internal->frame_size; j++) { |
| audio_in_out_buf[i][j] = |
| audio_io_buf_internal->audio_io_buffer_delayed[i][j]; |
| } |
| } |
| } |
| |
| return; |
| } |
| |
| VOID impd_advance_audio_io_buffer_time( |
| ia_audio_in_out_buf* audio_io_buf_internal) { |
| WORD32 i; |
| if (audio_io_buf_internal->audio_delay_samples) { |
| for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) { |
| memmove( |
| audio_io_buf_internal->audio_io_buffer_delayed[i], |
| &audio_io_buf_internal |
| ->audio_io_buffer_delayed[i][audio_io_buf_internal->frame_size], |
| sizeof(FLOAT32) * audio_io_buf_internal->audio_delay_samples); |
| } |
| } |
| |
| return; |
| } |
